Door-spring



T. l. MOORE.

000R SPRING. APPLICATION FILED JAN-24. l9l9- Patented Dec. 6, 1921.

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noon-seams.

Specification of Letters Patent.

Patented Dec. 6, 1921.

1 Application filed January 24, 1919; Serial No. 272,835.

To (ZZZ when bitmap concern.

Be it known that LTHoMAsJ. Moons,

acitizen of theUnited States, residing at lVashington, in the District of Columbia, have, invented, certain new and useful Improvements in Door-Springs; and I do hereby declare the following tobe a full, clear, and, exact description of theinvention, such as willenable others skilled in the art to which it appertains to. make and use the same. i

This invention relates to door springs and the primary object of the invention is to provide an improved means for tensioning the spring, so that the strength thereof can be readily regulated. 1

Another object of the invention is to pro vide an improved door springof the coil type having the upper bracket thereof carrying a pivoted pawl or latch which is mounted upon one of the attaching screws, the pawl or latch being adapted to engage one of the teeth formed on the upper end of the coil spring securing device so that the coil. spring can be turned to the required tension and the pawl or latch can be swung into engagement with the teeth and thus hold the spring against movement.

A further object of the invention is to provide an improved door spring of the above character, which is durable and ellicicnt in use, one that is simple and cheap to manufacture, and one that can be placed upon the market at a reasonable cost.

With these and other objects in view, the invention consists in the novel construction, arrangement and formation of parts, as will he hereinafter more specifically described, claimed and illustrated in the accompanying drawings, forming a part thereof, in. which:

l iguref 1 is a front elevation of the improved. door spring applied to a door.

Fig. 2 is an enlarged front elevation of the upper end of the spring, and bracket, showing the spring being tensioned.

F 3 is a front elevation of the upper bracket removed from the coil spring.

Fig. 41; is a side elevation of the upper ln'acket.

Referring to the drawings in detail, wherein similar reference characters designate corresponding parts throughout the several views, the numeral 1 generally indicatesthe improved door spring, which is adapted to be applied to the door 2 and easing 3 in the ordinary manner. 7

The improved door spring includes a coil spring 4: of the usual, or any preferred form, generally used for this class of door springs having its upper and lower ter-- minals secured to stems 5 and 6 of the upper and lower brackets 7 and 8, respectively- The brackets 7 and 8 have the stems 5 and 6 thereof recessed as at 9, for receiving the ends of the coil spring, which are bent into the same.

V The lower bracket, which is of the ordinary construction, includes the attaching plate 10 through which the attaching screws 11 extend and an outwardly extending angular arm 12 which supports the stem 6.

The upper stem 5 islinade independently of the bracket 7 and has a shoulder 13 formed intermediate the ends thereof, upon which the collar 14E of the upper bracket 7 rests. The annular shoulder 13 is provided with diametrically extending recesses 15 for a purpose, which will hereinafter more fully appear. The upper end of the stem 5 is provided with inwardly extending slots 16, which define radially extending teeth 17. The slots 16 terminate short of the annular shoulder 13 and this forms a bearing surface for engaging the collar 1. 1. The collar 141 extends at right angles to the attaching plate 18 of the upper bracket and this collar is formed adjacent to the lower end thereof and is provided with an upwardly extending inclined reinforcing cleat 19 which holds the collar against distortion. The attaching plate 18 is provided with outwardly extending cars 20 through which the @IiZt-ttOllll'lgGCTGWS 21 extend. A pawl. or latch member 22 has its rear end tl'iereof provided with an aperture 23, through which protrudesone of the attaching screws 21. This forms a convenlent means for pivotally securing the pawl or latch member in proper position for engaging in one of the grooves 16, so as to hold the spring in proper tensioned position. The pawl is located directly opposite to the strengthening rib 1.9.

in operating the improved device, a suit able pin is inserted in one of the openings 15 near the annular shoulder 13, as clearly shown in Fig. 2 of the drawings, and the latch member 22 is thrown back on the screw 21 and the collar, carrying the stem therewith, is turned until the spring reaches the required tension, when the pawl or latch is then thrown downward into engagement with the teeth which prevents "further movement of the spring in relation 7 o't my invention illustrated in the accompanying drawings and referred to in the above description, as the preferred embodiment, is'the most efficient and practical; yet realizing the conditions concurrent with the adoption of my device will necessarily vary, I desire to emphasize that various minor changes in details of construction, proportion and arrangement of parts may be resorted to. when required without sacrificing any of the advantages of my invention as set forth.

What I claim as new is:

1. A door spring device including a spring, a collar provided with an opening,

a'latch to extend over said opening, a stem secured to said spring, means on the stein to underlap the collar, said stem having a portion extending rotatably and slidahly through the opening and provided with means to engage the latch through upward movement of the portion, and means to facilitate the depression of the stem to release it from the latch and collar.

2. A door spring device including a spring, a bracket having a collar provided with an exposed opening, an exposed latch on said bracket movable to and from a position over said opening, a stem secured to said spring, a shoulder on the stem to uuderlap the collar, said stem having a portion extending rotatably and slidahly through the opening and provided with a groove to receive the latch when over said opening through upward movement of the portion, and means cooperating with the slmulder operable to depress the stem to release it from the latch and collar.

In testimon .whereof I aflix my signature in presence of a witness.

THOMAS J. MOORE.

Witness:

BURNETT S. downs. 

